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13115358 = 234194261
BaseRepresentation
bin110010000001…
…111111011110
3220200022220000
4302001333132
511324142413
61145035130
7216323124
oct62017736
926608800
1013115358
117448843
124485aa6
132942889
141a55914
151241073
hexc81fde

13115358 has 40 divisors (see below), whose sum is σ = 30942120. Its totient is φ = 4140720.

The previous prime is 13115329. The next prime is 13115363. The reversal of 13115358 is 85351131.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 948 + ... + 5208.

It is an arithmetic number, because the mean of its divisors is an integer number (773553).

Almost surely, 213115358 is an apocalyptic number.

13115358 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13115358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15471060).

13115358 is an abundant number, since it is smaller than the sum of its proper divisors (17826762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13115358 is a wasteful number, since it uses less digits than its factorization.

13115358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294 (or 4285 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 13115358 is about 3621.5132196362. The cubic root of 13115358 is about 235.8269223189.

Adding to 13115358 its reverse (85351131), we get a palindrome (98466489).

The spelling of 13115358 in words is "thirteen million, one hundred fifteen thousand, three hundred fifty-eight".

Divisors: 1 2 3 6 9 18 19 27 38 54 57 81 114 162 171 342 513 1026 1539 3078 4261 8522 12783 25566 38349 76698 80959 115047 161918 230094 242877 345141 485754 690282 728631 1457262 2185893 4371786 6557679 13115358